Hot-air furnace.



No. 627,525. Patented lune 27, |899. L. S. PFUUTS.

HOT AIR FURNACE.

(Application Bled Jam 20, 1899.)

2 Sheets-Sheet l.

(No Model.)

me Nonms PETERS co. Pnmaumo.. wAsNmToN. n. c

N01.. 627,525., Patented lune 27, |899.

L S. FFOUTS.

H-LUT AIB FURNACE.

(Application filed Jan. 20, 1898.)

(No ModeL) 2 Sheets-Sheet 2.

me NoRms PETERS ca, vnovouno., WASHINGTONA u. c.

UNITEDV STATES PATENT OFFICE.

LEROY S. PFOUTS, OF CANTON, OHIO, ASSIGNOR TO THE CANTON FOUNDRY ANDMACHINE COMPANY, OF SAME PLACE.

HOT-AIR FU RN'ACE.

SPECIFICATION forming part of Letters Patent No. 627,525, dated June 27,1899.

Application lec'l January 20J 189s. Serial No. 702,854. (No model.)

To all whom it may concern:

Be it known that I, LEROY S. ProU'rs, a citizen of the United States,residing at Canton, county of Stark, and State of Ohio, have inventedcertain new and useful Improvements in Hot-Air Furnaces, of which thefollowing is a specification.

One object of my said inventionis to provide afurnace made up of aplurality of secro tions, any one of which may be readily replaced incase of breakage, and having a sec# tional inner re-pot or lining whichmay be easily removed through the fuel-opening and replaced in the samemanner without necessitating in any way the dismantling of the furnace.y

A further object is to provide a sectional furnace in which in case ofany gas escaping from the fire-pot the likelihood of its reachzo ing thehot-air chamber will be reduced to a minimum.

A still further object is to secure a furnace in which the most completecombustion possible shall be secured by reason of hot air bez 5 ingsprayed over or upon the upper surface of the bed of coal.

I have illustrated the invention in the ac companying drawings, inwhichl Figure lis a central vertical section through 3o a portion of afurnace sufficient to illustrate my invention. Fig. 2 is a sectiontaken' at right angles to Fig. l. Fig. 3 is a sectional View with theinner lining removed, and Fig. 4 a detail. v

3 5 In the drawings, the numeral l represents a metal base of suitableform having a iiange I, forming a recess near its outer edge to receivethe lower edge of the outside jacket or casing 3. A second groove orchannel Ib is 4o formed -near the center, preferably, by two equidistantribs or beads', within which groove is seated the lower edge of section2, which forms the ash'pit or chamber, this section eX- tending to thefront of the casing, as shown in Fig. l, to the point where theusualash-pit door is provided. This section 2 is provided at its upperedge with a groove or channel 2,

and also has inwardly-projecting ledges for the support of the ordinaryor any desired 5o grate.

Upon the ash-pit section is placed a fire- C pot-supporting section 4,which has a depending rib 4a, fitting within the groove in the upperedge of the section 2. The upper face of the ring-section 4 is providedwith two concen- 5 5 tric grooves or recesses 4b and 4c, the inner, 4C,being preferably wider than Vthe outer. A circular section 5 su rmountsthis ring-section and is provided with a rib or flange fitting snuglythe groove or channel 4", the lower edge of 6o the section 5 beingextended, preferably, inward slightly beyond the ange to form abearing-ledge 5a. From the ring-section 4 the section 5 flares or curvesoutwardly, and it is provided at its upper edgewith two concentricchannels or recesses 5b and 5C, the outer,

5, being preferably arranged at a higher elevation than the inner. Asection 6 is located within the section 5 and is provided with alaterally-extending upper edge, which in its 7o turn carries adownwardlypro ]'ecting rib or flange adapted to rest within the grooveor channel 5", by which the section 6 is supported, while its lower edgeabuts against the edge 51.v From this construction it'will 75 beobserved that the sections 5 and 6 together form a circular air space orring, to which air is supplied'from an air-trunk 14, which is formedintegral with the section 5 and eX- tends to the-front 'of the furnacecasing or 8o jacket. In the other channel 5C, before referred to, reststhe lower edge of an outer section 7, the upper' edge of which is alsoprovided with aV groove or channel, (indicated at 7?.) AboveV this islocated a ring-section 8, 85 approximately semicircular incross-section, which'isprovided at its lower face or edge with auannular iiange or rib adapted to rest in the channel or groove 7a, whileits upper edge is provided with a groove or channel S 9o and an annulardepending bead or flange Sb. In'connection with this upper ring-section8 I provide a plurality of perforated sections 9, each of which isprovided with an inwardlyextending :rib or flange, which is adapted torest on the inwardly-projecting lower edge of the section S, while'theupper end of the perforated section rests behind the depending flangeSb. The ring 8 and sections 9 thus form an annular air ring or chamber,comroo municating by means of the plurality of perforations with theinterior of the lire-pot above the fuel-line. In order to supply air tothis ring, a pipe or pipes l2 are provided, extending between the rings6 and 8, as clearly shown in Fig. 2, and connected to each in anysuitable or desired manner.

The numeral 1l designates the inner lining of the fire-pot, which ismade up of a series of sections of reproof material of a size adapted tobe readily removed through the fuel-opening B. These sections rest atthe lower ends in the groove or channel 4C, while their upper ends abutagainst the lower portions of the inner faces of the sections 9, thusholding them against inward displacement. The section 8 is sui-mountedby a dome l0, having its lower edge resting in a groove in the upperedge of the ring S, while above the dome may be placed the ordinaryradiator, which, as it forms no part of the present invention, is notillustrated herein.

The manner in which the air for combustion passes to the fuel will bereadily understood from the foregoing description. Cold air passingthrough the trunk 14 into the annular space between the ring 5 and Gcomes in contact with the highly-heated metal. Part of the air passesdirectly to the fuel through openings a and b, formed, respectively, inthe ring or section 6 and 011e of the innerliningpieces l1. Theremaining air, heated by the walls of the circular chamber, passesupward into the upper circular chamber between sections S and 9, itstemperature being raised during the passage, and in a highly-heatedcondition is sprayed through the openings in the sections 9 upon thebody of fuel within the fire-pot, thus causing complete combustion ofall gases and the like given od by the burning fuel.

Ordinarily where any cracks occur in the fire-pot gases can escapedirectly into the airspace. In my construction it will be observed thatthis is ilnpossible, as owing to the deadair space formed between theouter ring 7 and the inner lining any gas escaping from the combustioninto this space will simply rise up into the upper portion of thefire-pot.

IIaving thus described my invention, what I clailn is- 1. In a furnace,the combination with the lire-pot and outer easing, of a lower annularair-chamber, an upper air-chamber communicating through openings withthe interior of the fire-pot, an outer wall or section extending betweenthe two chambers and forming a dead-air space between the fire-pot andouter wall, and pipe communication between the lower and upper annularair-chambers, substantially as described.

2. In a furnace, a lower annular air-chamber, an upper annularair-chamber, air-pipe connections between the same, a {ire-potlinsupported from the wall of said lower chamber, anupperannularair-chambersupported from said outer wall, an inner fire-potlining consisting of a plurality of sections resting at their lower endsupon the fire-pot-supporting section and extending upwardly to the upperannular air-chamber, and air-pipe connections extending between saidchambers through the space between the ire-pot lining and outer wallwith communicating openings between the upper air-chamber and thetirepot, substantially as described.

4. In a furnace, a lower annular air-chamber encircling the fire-pot, anouter wall supported therefrom, an upper ring substantially semicircularin cross-section supported from said outer wall, a plurality ofperforated sections removably seated against the open side of said upperring, a fire-pot lining comprising a plurality of sections removablysupported with their lower ends in proximity to the lower annularair-chamber and their upper ends abutting against the inner faces of theperforated sections, and pipe connections from the lower annularair-chamber to said upper ring, substantially as described.

5. In a furnace, a base, an ash-pit section 2 resting thereon, a ring 4resting on said section 2, a section 5 curved in cross-section snpportedfrom said ring, an inner section 6 having an outwardly-curved upper edgeengaging the upper edge of section 5 and forming therewith an annularchamber, an outer annular wall 7 supported by the section 5, an upperannular section 8 carried by the wall 7, removable perforated sections 9closing the open side of section 8 and forming an annular chamber,air-pipe connections between said annular chambers, and a fire-potlining comprising a plurality of sections removably supported upon thering-section 4 and extending upwardly and abutting against the lowerinner faces of the perforated sections, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

LEROY S. IFOUTS.

\V i tnesses:

GEO. W. JAHN, W. II. CAVNAH.

IOO

ITO

